Issues with nrf52dk I2C with BMA400

RE: Issues with nrf52dk I2C with BMA400

Syed Maysum Abbas Zaidi — Mon, 05 Jan 2026 08:13:03 GMT

Hi,

Glad to hear it worked and thanks a lot for your feedback.

Best Regards,
Syed Maysum

RE: Issues with nrf52dk I2C with BMA400

federicoc — Sat, 03 Jan 2026 03:55:26 GMT

Actually it works and the solution was indeed to put the compatibility line as you guys recommended.

Initially I rewrote some code using i2c_reg_read_byte, but this takes a device as first argument and not a dev_spec. This was why I was not able to move to the next line of code.

Thank you all and Happy 2026!

RE: Issues with nrf52dk I2C with BMA400

federicoc — Fri, 02 Jan 2026 15:45:43 GMT

Thank you Dani and Syed for your reply.

I added the lines as you recommended, but still it silently fails when calling i2c_reg_read_byte as before.

I was trying to start from one of the I2C examples from the dev academy but today I will try from the blinky example as recommended in your post.

RE: Issues with nrf52dk I2C with BMA400

Syed Maysum Abbas Zaidi — Fri, 02 Jan 2026 13:04:22 GMT

Hi,

Yes, please add a compatible = "nordic,nrf-twim" under &i2c0, as TWIM is the recommended I2C master and confirm if it works.

Best Regards,
Syed Maysum

RE: Issues with nrf52dk I2C with BMA400

IoT-Dani — Wed, 31 Dec 2025 08:37:05 GMT

Hi federicoc

Try to put a compatible = "nordic,nrf-twim".

&i2c0 {

compatible = "nordic,nrf-twim";

status = "okay";

pinctrl-0 = <&i2c0_default>;

pinctrl-1 = <&i2c0_sleep>;

pinctrl-names = "default", "sleep";

under &i2c0 {

That might solve your problem.

Quote from Syed Maysum Abbas Zaidi: It worked as on nRF52, TWIM is the recommended I²C master (supports EasyDMA, etc), and Nordic’s own TWIM example explicitly sets it here.

Kind regards, Dani